MECHANICAL TECHNOLOGY MEGANIESE TEGNOLOGIEGRADE 10 GRAAD 10NOVEMBER 2011

MEMO_________________________________________________________________________________

QUESTION 1VRAAG 1

1.1 a X c d1.2 X b c d1.3 a b c X1.4 a b X d1.5 b X d1.6 a X c d1.7 a b X d1.8 a b c X1.9 a b c X1.10 a b X d1.11 a X c d1.12 X b c d1.13 X b c d1.14 a b X d1.15 a X c d1.16 a X c d1.17 a b X d1.18 a b c X1.19 a b X d1.20 X b c d

(one mark each) [20]

QUESTION 2

2.1.1 Resultant Force / Resultante krag 47N 136 (5)2.1.2 Equilibrant / Ewewig 47 N 316 (2)2.1.3 -32 N (3)

2.2

77 N 65 (10)

2.3 Hydraulics works with a fluid and Pneumatics work with airHidrolies werk met vloeistof en Pneumaties met lug (4)

2.4 Flat belt-Long distances Plat belde – oorlang afstande (2)V-Belts – Transmit power V-Belde- Oordrag van krag (2)Wedge-Belt - Transmit Power Wig-Belde- Oordrag van Krag. (2)

2.5 (3)

2.6 Control the incoming and out going gases in the engineBeheer die inkomende en uitgaande gasse in ‘n motor (3)

2.7 Mechanical- Fiction Meganies – WrywingHydraulic- fluid Hidrolies - Vloeistof (2)

2.8.1 Equilibrant / Ewewig 29 N 24 (8)2.8.2 (H) 11N (V) 26N (4)

[50]QUESTION 3

3.1.1 Combination pliers – General work and to keep an object in position (2)Kombinasie tang Algemene werk

3.1.2 Long nose pliers – use where hands can’t fit in (2)Langbek tang fyn werk

3.1.3 Waterpump pliers – used for larger objects (2)Waterpomp tang Vir groter voorwerpe

3.2. Hardness Flexible all over or just the teeth (2)Hard buigbaar Geheel verhard of slegs die tandeSet How the teeth are spaced (2)Set hoe die tande gespasieer is

Tooth size Teeth / 25mm (2)Tandgrote Tande per 25mm

Length The length (2)Lengte Lengte

3.3.1 Hex / allen3.3.2 Slotted/ Gleuf3.3.3 Phillips3.3.4 Pozidrive3.3.5 Torx3.3.6 Hexagon /Seskantig (one mark each) (6)

[20]

QUESTION 4

4.1 Less ductile, harder, greater tensile strengthGroter hardheid, rekbaarheid verminder, sweisvermoë neem af en treksterkte verhoog (Enige drie) (3)

4.2.1 Strength: refers to the material’s ability withstand forces applied to it Sterkte: verwys na die material se vermoë om weerstand te bied teen krag

wat daarop uitgeoefen word. (2)

4.2.2 Toughness: refers to the material’s ability withstand shock loads and remain intact Taaiheid: om skoklading te weerstaan en ongeskonde te bly na voortdurendebuiging in teenoorgestelde rigtings. (2)

4.2.3 Elasticity: refers to the material’s ability to absorb forces and flex in different directions and return to its original shape when the load is removed. Elastisiteit: om kragte en buiging in verskillende rigtings te absorbeer, en weer

na sy oorspronklike vorm terug te keer. (2)

4.2.4 Plasticity: refers to the material’s ability to change in shape permanently Plastisiteit: om permanent van vorm te verander . (2)

4.3.1 Harder, Stainless Harder Vlekvry (2)4.3.2 Increases strength, toughness high temp Verhoeg sterkte , taaiheid by hoë temp (2)4.3.3 Ductility, Strength, hardness, toughness Rekbaar-, sterkte, hard-, taaiheid (2)

4.4 Thermoplastics / Thermosetting plastics Termoplastiek / Termoverhardeplastiek (2)

4.5 Brass/ Bronze Geelkoper / Brons (1)

[20]QUESTION 5

5.1 Poor housekeeping Deurmekaar werkplekLoose clothing Lospassende klereImproper use of tools verkeerde gebruik van gereedskapIn-accurate setting-up of machines. Onakuraate stel van masjiene (4)

5.2 Expensive treatment Duur behandelingLost in manpower Verlies in mannekragLost in working hours Verlies in werksureOrphan children Wees kindersTreatment of opportunistic sickness Behandeling van skynsiektesTB treatment Tering behandeling (any four) (4)

5.3.1 Mr Peter services, panel beats and sprays vehicles.Supply cold storageMnr Peter diens, paneelklop en diens voertuieVerskaf koelkamer geriewe (any two) (2)

Noise and polutionGeraas en besoedeling (2)

5.3.2 Silencer on generator and dump the oil at the recycle plantKnaldemper op kragopwekker en stort die olie by ‘n herwinnings area (3)

5.4 Remove key from chuckVerwyder sleute uit klembusNever leave the machine unattendedMoet nooit die masjien onbeman laat nieClamp the work piece secureKlamp die werkstuk stewig vasDon’t stop the machine with your handMoenie die masjien met jou hand tot stilstand bring nieDon’t force the machineMoenie die masjien forseer nieNo loose clothesGeen los klere nie (any four) (4)

5.5

(2)

5.6

(two per sketch) (6)

5.7.1 Bout deursnit

6,05 x √t19,13 mm (3)

Steek (P)

3 x D= 57,4 mm (2)

C10,8 x P

45,9 mm (2)

Kant ruimte

= 1,5 D= 28,7 mm (2)

5.8 Hardened and ground dowel pinsVerharde en geslypte tappenneTaper pinsTap se penneClevis pinsVurk penneCotter pinsSplit penne (4)

5.9.

(3)

5.10

(2)

5.11.1 Green first aid: Emergency exit, information, starting device, miscellaneous safety conditions.Groen noodhulp: Nooduitgang, Inligting, aanskakel en ander

veiligheidsmeganismes. (2)

5.11.2 Orange electrical switch gear, electrical service, expose machine partsOranje elektriese skakelwerk, elektriese dienste, onbedekte masjiendele (2)

5.11.3 Blue: Drinkable water pipesBlou: aanduider op drinkwaterpype (2)

[50]

QUESTION 6

6.1.1 Oiliness – the ability to cling to a metal surface to provide a boundry layer (2)Smeervermoë – om aan ‘n metaaloppervlak te klou en ‘n grenslaag te vorm.

6.1.2 Viscosity – the resistance to flow (2)Viskositeit – vloeiweerstand

6.2.1 Rubber -red rubber grease - prevent hardening or swellingRubber – rooi rubber ghries – voorkom verharding en uitsetting (2)

6.2.2 Anti –seize – copper anti-seize compound – striped copper and graphite – high melting point (2)Teenvasbrand – teenvasbrand samestelling – koper en grafietdeeltjies hoë smeltpunt

6.2.3 Wheel bearings – wheel bearing grease – high melting pointWiellaer – wiellaer ghries – hoë smeltpunt (2)

6.3 Reduce friction Verminder wrywingReduce wear Verminder slytasieTransfer heat away Verwyder hitteReduce corrosion Verminder korasie (any three) (3)

6.4.1 Direct air cooling – The air flow over finned cylinders – to increase the hot surface to the flow of cool air Lugverkoeling – die lug vloei oor finne om die warm oppervlakte te vergroot (2)

Advantages/Voordelecheap, light weight, no leakages or freezing problems (any two) (2)goedkoop, liggewig , nie onderhewig aan lekkasie of vriesing nie (enige twee)

6.5 Intake stroke /InlaatslagPiston moves down / Suier beweeg afwaartsIntake valve opens and exhaust valve is closed / Inlaat klep oop, Uiltaatklep toeFresh fuel mixture is taken in / ‘n lug/brandstof mengsel kom binne (4)

Compression stroke / Kompressieslag Piston moves up / Suier beweeg opwaartsInlet valve closes and exhaust valve is closed / Albei kleppe is toeMixture is compressed / Die lug/brandstof mengsel word saamgepers (4)

Power stroke / KragslagJust before piston reaches t.d.c., spark from the spark plug ignites the compressedair/fuel mixture / Net voordat die suier B.D.P beruik, ontstaan daar ‘n vonkExplosion and rapid expansion of the mixture / die mengel ontbrand en dit veroorsaak uitsittingPiston is forced down and force is transferred to the crankshaft / suier wordkragdadig afwaarts geforseer en draai die krukas. (4)

Exhaust stroke / UitlaatslagPiston moves up / Suier beweeg opwaartsExhaust valve opens, intake valve is closed / Uitlaatklep is oop, inlaatklep is toe

Burnt gasses is forced out / Ontbrande gasse word uitgeforseer deur suier (4)one mark per correct order (4)three marks per explanation (12)

6.6 Timing belts do not require lubrication and are more quieter than gearsReëlbande hoef nie gesmeer te word nie en loop stiller (2)

6.7 Non-mechanical lubrication Nie-meganiese smeringMechanical lubrication Meganiese smeringForced system lubrication Druksmering (3)

6.8 The oil filter catches small particles of dirt and metal in the oilDie oliefilter vang klein deeltjies, onsuiwerhede en metaal in die olie op (2)

[40]

TOTAL / TOTAAL : 200